<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登入表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名  prop指定不同校验规则-->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
            prop=""
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item  prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login" >登入</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 登入表单绑定数据
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这个是表单验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登入名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在3到10个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在6到15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置输入信息
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        // 在main.js中已经挂载好
        // 当返回值是Promise时使用 async  await
        // const result = await this.$http.post('login', this.loginForm)
        // console.log(result)
        // 解构赋值
        const { data: res } = await this.$http.post('login', this.loginForm)
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('登入失败')
        this.$message.success('登入成功')
        // 1.登入之后token 保存到客户端 sessionStorage  localStorage
        // 2.跳转到后台
        // 保存session
        window.sessionStorage.setItem('token', res.data.token)
        // 编程式导航
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
// 把盒子放到屏幕正中央
.login_box {
  width: 450px;
  height: 300px;
  background-color: white;
  border-radius: 3px;
  // 上下移动
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  // 修饰头像
  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #eee;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    //超出范围了
    box-sizing: border-box;
  }
  //向后对齐
  .btns {
    display: flex;
    justify-content: flex-end;
  }
}
</style>
